Colour television receiver

ABSTRACT

In a colour television receiver wherein three electron beams respectively modulated by red, green and blue video signals are simultaneously deflected to display on a fluorescent screen a composite picture image of three colour picture images, there is provided a time axis converter for compressing, expanding or delaying with respect to time the image signal adapted to modulate at least one electron beam in one horizontal scanning period for different intervals so as to accurately superposing each other the multi-colour picture images over the entire surface of the fluorescent screen thus forming a multi-colour composite picture image free from any misalignment.

United States Patent 1 1 Sano et al. July 1, 1975 1 COLOUR TELEVISION RECEIVER 3.682.813 8/1972 Dun et al 208/89 3,708,616 H1973 Von Felgel 1 7 0 173/54 M [751 lnvemmsl shmichl lama; Kmch' 3.720.782 3/1973 Kaminski et al. 178/52 D Kit/Sahara, YOkOhama, both of 3,728,250 4/1973 Hass et al. 208/89 Japan; Harry C- Murphy, J $301,494 4/1974 Moore et a1. 208/89 Apollo; Harry C. Staufier, Cheswick, both of Pa. Primary Examiner-Richard Murray A I T S b E1 1: C Ltd., [73] sslgnee Kat/ 21 5812 fa g :11 cc rm D Attorney, Agent, or F zrm-Flynn 81. Fnshauf [22] Filed: June 28, 1973 [21] Appl. No.: 374,311 1 1 B TRACT [30] Ford n Application Priority Data in a colour television receiver wherein three electron g beams respectively modulated by red, green and blue July 1972 Japa 4165417 video signals are simultaneously deflected to display 1972 Japan 4185394 on a fluorescent screen a composite picture image of Sept Japan 47'90448 three colour picture images, there is provided a time Sept H, 1972 Japan .7 4190449 axis Converter compressing expanding or delaying 1972 Japan 47406219 with respect to time the image signal adapted to mod- Japan 41107918 ulate at least one electron beam in one horizontal Japan 47427717 scanning period for different intervals so as to accurately superposing each other the multi-colour picture images over the entire surface of the fluorescent n screen thus forming a multi-colour composite picture [58] Field oi Search l78/5.4 kgggmlg, image free from any misalignment 5 References Cited 15 Claims, 93 Drawing Figures UNITED STATES PATENTS 3,189,540 6/1965 Kozlowski et al 208/89 ANA LOGUE 96 MULTIPLEXER 40 94b 94c 94d PATENTEUJHL SHEET a a 1 1 G w .l. i F m 1. 7 bf mm IL "ATEI TFHJULI 1975 3.893174 SHEET 2 FIG. 3 3 4111 R SCANNING TIME FIG. 4

DEMODU LATOR DEFLECTION CIRCUIT 72,73, 24-. SIGNALTREATIN CIRCUIT 76, 77, 7B DRIVER CIRCUIT 79,80, 8'! IVIDEO AMP SHEET FIG.II

SCANNING TIME FIG.I2

wrmuu ms .893.174 SHEET 11 Fl 6J8 F I 6. l9

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Fl 6. 2 I |e|,:e2,|e:s=

DELAY cmcun- 94:: F l G. 22

m4 I90, l9l, |s2= SHIFT REGISTER SHEET 13 93,174

F I G. 2 5

a, PHAS LP COMPARATOR SIGNAL FREQUENCY esu DIVIDE n v c 0 2i: 2218 v zs PATENTFHJUL: m5 3.893.174

SHEET 14 PATHHEDJUL'I 197s 8 93174 SHEET 16 FIG.28N i U i L FIG.28O i U i FIG.28P m Flazao U i FIG.28R J 1 LJ i FIG.28S Li FIG 28 \i/ PKTFIITEUJUL 1 SHEET FIG.29

"SIGNAL GEN PIC-3.30

PATENTEDJUU I975 JL'8934174 SHEET 18 I 285 283 DEMODULATOR SIGNAL TREATING 291 cmcuw 2M! 286: V'DEO AMP FIG. 32

ETF TFMJLI DELAY TIMEU) HORIZONTAL SCANNING TIME FIG.

DEMODU LATOR 79 72 I 5| 52 7| SYNC SIG NA L SEPARAT OR DEFLECT'ON CIRCUIT 72,73,741 SIGNAL TREATING CIRCUIT 76,78. DRIVER 79,80,8l :VIDEO AMP 

1. A color television receiver comprising an in-line type color cathode ray tube including: a vacuum vessel having a neck portion and an enlarged portion, a fluorescent screen formed on the enlarged portion of said vacuum vessel and three electron guns provided in the neck portion of said vacuum vessel for emitting a center electron beam and two side electron beams, said electron guns being arranged in-line in the scanning direction of said center and two side electron beams; a deflection means mounted on the neck portion of said vacuum vessel for scanning said electron beams on said fluorescent screen; means for generating red, green and blue video signals for modulating said center and two side electron beams; and signal processing means including first means for subjecting a video signal for modulating the center beam to a fixed delay, and second means coupled to said generating means for electrically processing two video signals which are coupled to modulate said side electron beams, said second means varying a time dependent electrical characteristic of said two video signals by different amounts during a horizontal scanning period, said characteristic being varied symmetrically with respect to both the preceding and succeeding scanning time relative to a center point of said horizontal scanning period.
 2. A colour television receiver according to claim 1 wherein said signal processing means comprises a variable delay line.
 3. A colour television receiver according to claim 1 wherein said signal processing means comprises an analogue shift register.
 4. A colour television receiver according to claim 1 wherein said signal processing means comprises a divided type discontinuous delay line.
 5. A colour television receiver according to claim 1 wherein said signal processing means comprises a memory device adapted to store a video signal.
 6. A colour television receiver according to claim 1 wherein said three electron guns are arranged at an angle so that the cross-point of the axes of said three electron guns is located on the outside of said fluorescent screen.
 7. A colour television receiver according to claim 1 wherein said signal processing means is combined with deflection means which functions such that when three electron beams are caused to scan the fluorescent screen without being processed, said three electron beams will coincide with reference to the raster scanning line, whereas with respect to a line at right angles to the scanning line, the spacings between said three electron beams will be equal from the upper edge to the lower edge of the picture image.
 8. A colour television receiver according to claim 1 wherein said signal processing means converges the distortions of a picture image in addition to composing three-colour pictures.
 9. A color television receiver according to claim 1 wherein said second means of said signal processing means comprises delay means for delaying said video signals.
 10. A color television receiver according to claim 9 wherein said second means of said signal processing means further includes signal compression means for compressing at least one of said red, green and blue video signals.
 11. A color television receiver according to claim 10 wherein said second means of said signal processing means further includes signal expansion means for expaNding at least one of said red, green and blue video signals.
 12. A color television receiver according to claim 1 wherein said second means of said signal processing means includes signal compression means for compressing video signals.
 13. A color television receiver according to claim 12 wherein said second means of said signal processing means further includes signal expansion means for expanding at least one of said red, green and blue video signals.
 14. A color television receiver according to claim 1 wherein said second means of said signal processing means includes expansion means for expanding video signals.
 15. A color television receiver according to claim 1 wherein said signal processing means includes delay means for delaying at least one of said red, green and blue video signals. 